Perhaps a phone call to "headset services" at shoreham, Found them very helpful in the past.
Also I think the electret mic is rectangular shape with rounded end, the dynamic one a round shape lump on the end of the boom..(dont quote me though. it may be a different manufacturer that does that)
Last edited by tony 1969; 2nd June 2008 at 13:10.
Reason: added last sentence